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Bel Fuse Inc. Class B Common Stock BELFB

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Market datapartial · fetched 2026-10-23T16:44:05.664Z

Delta surfaceAlpaca · derived absolute-delta buckets · 2026-11-20

Calculation methodology

Options historyIV: ThetaData historical Greeks, equal-weight mean of call/put 50-delta IV across the next four listed Friday-cycle expirations, including holiday shifts verified against ThetaData’s market calendar. Missing inputs leave gaps. Skew and implied move: recorded expiration-specific observations.

History data

PriceAlpaca · sip · 2026-10-23T16:38:40.633712141Z

FundamentalsAlpha Vantage · unavailable

Share price$201.12
1D+1.6%
$197$198$200$201$2035:30 AM6:30 AM9:00 AM1:00 PMBELFB
Sold putSold call

Bel Fuse Inc. Class B Common Stock options

Live interpolated BELFB call and put midpoint premiums by absolute delta.Bel Fuse Inc. Class B Common Stock$4.00$13.61$23.22$32.83$42.44$152.16$182.45$212.75$243.04$273.3420Δ25Δ30Δ35Δ40Δ45Δ50Δ55Δ60Δ65Δ70Δ75Δ80ΔOPTION PRICELive BELFB spot · $201.12BELFB PRICE$5.04$5.29$6.47$7.95$9.69$11.45$13.62$15.80$18.41$21.06$25.52$28.79$33.69$5.27$6.35$8.21$9.89$11.90$14.28$16.88$19.47$22.24$25.01$28.94$33.17$39.67
PutsFair1.04×
CallsExpensive1.42×
SkewBullish-4.57 pp
Implied moveBearish±$30.49
TiltBearish8.7% PUT
Table
Values and derived Greeks for the plotted delta buckets
DeltaCallsPuts
Pseudo strikeIVB/E movePseudo strikeIVB/E move
20Δ257.5890.9%30.6%172.3876.5%16.9%
25Δ234.6670.2%19.3%180.5969.0%13.4%
30Δ226.1966.5%15.7%185.7169.7%11.7%
35Δ220.3966.8%13.5%190.9867.6%10.0%
40Δ215.2567.1%11.8%195.8167.0%8.6%
45Δ210.1567.4%10.2%200.5167.1%7.4%
50Δ205.3568.0%8.9%205.2366.7%6.3%
55Δ200.5668.6%7.6%209.9566.3%5.3%
60Δ195.7069.6%6.5%214.5764.8%4.4%
65Δ190.8169.4%5.3%219.1963.3%3.5%
70Δ184.9774.3%4.7%224.5862.8%2.7%
75Δ179.6173.0%3.6%230.2062.6%2.0%
80Δ173.1074.7%2.8%237.8463.6%1.5%

20Δ

Calls
Pseudo strike
257.58
IV
90.9%
B/E move
30.6%
Puts
Pseudo strike
172.38
IV
76.5%
B/E move
16.9%

25Δ

Calls
Pseudo strike
234.66
IV
70.2%
B/E move
19.3%
Puts
Pseudo strike
180.59
IV
69.0%
B/E move
13.4%

30Δ

Calls
Pseudo strike
226.19
IV
66.5%
B/E move
15.7%
Puts
Pseudo strike
185.71
IV
69.7%
B/E move
11.7%

35Δ

Calls
Pseudo strike
220.39
IV
66.8%
B/E move
13.5%
Puts
Pseudo strike
190.98
IV
67.6%
B/E move
10.0%

40Δ

Calls
Pseudo strike
215.25
IV
67.1%
B/E move
11.8%
Puts
Pseudo strike
195.81
IV
67.0%
B/E move
8.6%

45Δ

Calls
Pseudo strike
210.15
IV
67.4%
B/E move
10.2%
Puts
Pseudo strike
200.51
IV
67.1%
B/E move
7.4%

50Δ

Calls
Pseudo strike
205.35
IV
68.0%
B/E move
8.9%
Puts
Pseudo strike
205.23
IV
66.7%
B/E move
6.3%

55Δ

Calls
Pseudo strike
200.56
IV
68.6%
B/E move
7.6%
Puts
Pseudo strike
209.95
IV
66.3%
B/E move
5.3%

60Δ

Calls
Pseudo strike
195.70
IV
69.6%
B/E move
6.5%
Puts
Pseudo strike
214.57
IV
64.8%
B/E move
4.4%

65Δ

Calls
Pseudo strike
190.81
IV
69.4%
B/E move
5.3%
Puts
Pseudo strike
219.19
IV
63.3%
B/E move
3.5%

70Δ

Calls
Pseudo strike
184.97
IV
74.3%
B/E move
4.7%
Puts
Pseudo strike
224.58
IV
62.8%
B/E move
2.7%

75Δ

Calls
Pseudo strike
179.61
IV
73.0%
B/E move
3.6%
Puts
Pseudo strike
230.20
IV
62.6%
B/E move
2.0%

80Δ

Calls
Pseudo strike
173.10
IV
74.7%
B/E move
2.8%
Puts
Pseudo strike
237.84
IV
63.6%
B/E move
1.5%

Options history

BELFB59.0960.1061.112026-10-20: 59.23%2026-10-21: 59.33%2026-10-22: 60.97%Oct 20Oct 22
Table
DateIV
59.23%
59.33%
60.97%